Extension cord holder



FIG. 1 is a front elevational view of an extension cord holder showing my new design;

FIG. 2 is a back elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top view thereof; and

FIG. 6 is a bottom view thereof. 

The ornamental design for an extension cord holder, as shown. 